Monitor



FIG. 1 is a front view of a monitor showing our new design;

FIG. 2 is a left-side view thereof, the right-side view being a mirror image thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is a bottom view thereof.

The closely spaced parallel diagonal shade lines represent a translucent surface. The dashed broken lines are for the purpose of illustrating portions of the monitor and forms no part of the claimed design. 

CLAIM The ornamental design for a monitor, as shown and described. 